Method of making open-face envelops.



G. W. SWIFT, JR. METHOD 0F MAKING OPEN FACE ENVELOPS.

APPLICATION FILED APR. 1. 1915.

1,275,323. Patented Aug. 13, 1918.

WH'NESES: lNVENTOR:

vwggu GEORGE W. SWIFT, JR, 019 BQRDENTOWN, NEW JERSEY.

METHOD OE MAKING GPEN-FACE ENVELGPSL To all wiwm it may concern covered by transparent or translucent material sealed thereon to prevent acess to the contents of the envelops through said openingsw I In accordance with my method individual envelop blanks, out from plane paper or other suitable fabric, and of any desired configuration, and respectively provided with openings as aforesaid, and with ad hesive matemal at the margins of said open ings, are fed singly, in succession, to mechanism whereby a web of the transparent or translucent material of such length that it may be used to form a plurality, of covers, for successive envelops, is progressed with its plane normal to the plane in which the envelop blanks are being progressed, and patches of said transparent or translucent material, each of such dimensions as to form a. cover for a single envelop opening, are out from said continuous web, turned parallel with the face of the respective envelop blank provided with the adhesive, and pressed thereon in position to cover the opening therein.

. I do not herein claim broadly the method of forming transparent coverings for open face envelops by cutting a succession of patches from a continuous web. Such mechanism has heretofore been used in con-- junction with mechanism for progressing a continuous Web from which envelop blanks lire to be subsequently formed; the latter web being progressed in definite relation to punching mechanism by which openings are formed in it in definite relation to the operation of the patch forming mechanism; the product of such a method being a continuone web having openings covered with patches, which Web must subsequently be out to form individual envelop blanks around the respective openings in the Wfib Such a method and means for cilecting it Specification of Letters Patent.

are disadvantageous in that but one size of envelops can be economically made therewith, because, as the envelop web is continuous from the punching to the patching mechanism. the openings must be formed therein in invariable relation to the patching mechanism and, if it is desired to form smaller envelops than those for which the mechanism is designed, it is, of course, necessary to form the blanks for the same respectively surrounding the, openings in the Web and Waste more or less of the web intermediate of said openings. Therefore, my method is advantageous in that envelops of different sizes may be formed with the same punching and patching mechanisln, without Waste of material, because it is only necessary to vary the rate at which the separate individual envelop, blanks, used by my method, are supplied to the patching mechanism, without changing the rate of operation of the latter. That is to say, in accordance with my method, with the patching mechanism operating at a. given rate, small envelop blanks are supplied thereto at a slower rate than large envelop blanks, so as to afford such space between successive envelop blanks as to present the openings therein to the patching mecha nism at the proper time; the openings in successive envelop blanks being thus presented in greater spaced relation with each other than in the Web from which they were formed without waste of material intermediatc of their respective openings.

My inventionincludes the various novel features hereinafter more definitely speci lied and claimed.

In thc druwing; Figure I is a diagrammatic vertical sectional view of mechanism for feeding, cutting and applying the trans parent or translucent material'to the envelop blanks, and contemporanermsly feeding the lattcn II is an inside face view of a plane envelop blank provided with an opening having adhesive at the margin thereof and adapted to be treated in accordance with my method by the mechanism shown in Fig. I.

Fig. ill is inner face view of said envelop blank shown in Fig. H, after the opening therein is covered bya patch or the transparent fabric, by the mechanism shown in Fig. l,

Patented Aug". 213, Mild, Application filed April i, 1915. serial No. 18,611.

Fig. IV is a front view of the completed envelop formed by folding the blank shown in Fig. III.

Fig. V is a rear view of the envelop shown in Fig. IV.

Fig. VI is an inside face view, similar to Fig. II, but showing a difl'erent configuration of envelop blank provided with an opening having adhesive at the margin thereof and adapted to be treated in accord ance with my method by the mechanism shown in Fig. I.

Fig. VII is an inner face view of said envelop blank shown in Fig. VI, after the opening therein is covered by a patch of the transparent fabric, by the mechanism shown in Fig. I.

Fig. VIII is a front view of the completed envelop formed by folding the blank shown in Fig. VII.

Fig. IX is a rear view of the envelop shown in Fig. VIII.

Referring to Fig. I; the web 1, of transparent or translucent paper or other suitable 'fabric, is drawn over the guide roll 2 and by the feed rolls 3 and 4. which are so related as to eliminate the curl of said web, due to its having been previously tightly wound. Said feed rolls 3 and 4 present said web 1 in plane form between the shear rolls 6 and 7 which respectively carry CUttGI'S S and 9 in such cooperative relation as to shear from said web 1 successive patches 10; one such patch being sheared from said web 1 at each revolution of the rolls 6 and 7 in the direction of the arrows indicated. in Fig. I. Said mechanism also includes the feed roll 12 which is opposed to said roll 7, and rotated in the direction of the arrow, so as to engage and feed between said rolls 7 and 12 successive individual envelop blanks 14 which are entirely independent of each other. As shown in Fig. II each of. said envelop blanks 14 has an opening 15 formed thr-n'cin having adhesive 16 at its margin; so that, as said blanks are progressed down.- wardly between said rolls 7 and 12 the patches 10 are pressed upon the successive blanks in position to cover the respective openings therein as shown in Fig. III. Said blanks 14, when creased on the lines 18 indicated in Figs. II and III, may be folded to form envelops 20 as imlicated in Figs. IV and V.

In the operation above described; Said. mechanism being operated at a given rate, it is necessary to supply said envelop blanks 14L thereto at such a rate as to present their respective openings 15 in proper relation with the patches 10, as the latter are turned from a plane normal to said blanks.,to' a plane parallel with said blanks and are pressed thereon between said rolls 7 and 12; said rate of supply of the blanks 14 to the patching mechanism being different from the rate required for supplying the blanks 23 shown in Figs. VI and VII; said blanks 23 being not only of an entirely different configuration, but longer than said blanks l t, in the direction of their movement with respect to said patching mechanism. However, said blanks 23 are like the blanks 14 in that they are provided with respective openings 24 having adhesive 25 at the margin thereoii' similar to the openings 15 with the adhesive margin 16 in said blanks l4, and adapted to be covered by patches 10 of the same size, as indicated in Fig. VII. Said patches 10 are applied to the blanks 23 in precisely the same way as they are applied to'the blanks 14, as above described; the only difference being in the rate at which said blanks, M and 23, are supplied to the patching mechanism; because of their respectively dilig'erent lengths. Said blanks 23,

When creased on the lines 27 indicated in Figs. VI and VII, may be folded to form envelope 28 as indicated in Figs. VIII and IX.

The patching mechanism above described may be supplied with envelop blanks by hand or by any suitable mechanism; for in stance, rolls 29 and 30, indicated in dotted lines in Fig. I, may be used to engage the blanks between them and present them to said patching mechanism at the desired rate.

Although I find. it preferable to apply the adhesive to the margins of theopenings in the envelope, as above described; of course, it may be applied to the patches 10 in position to engage said margins; the only essential being that there shall be sufficient adhesive material between the envelop blanks and the patches to retain the latter.

I do not desire to limit myself either to the particular forms of the envelop blanks or to the details of? construction of the mech anism herein shown, as it is obvious that various modifications may be made therein without, departing from the essential featurcs of my invention as defined iii the ap pended claims.

1. The method of making open face envelops, which consists in continuously progressing a web of transparent material, successively cutting from said web at a predetermined rate patches of said material of such dimensions as to form covers for envelop openings, supplying individual envelop blanks having openings therein to said patches successively and independently of said patch cutting mechanisnn but in such timed relation to the rate at which the patches are supplied that the distance be tween the proper position of the openings always remains the same, so that the opening in each blank comes into registry with a patch and is covered thereby, irrespective of the character of the blank 2. The method of making open-faced envelops which consists in continuously progressing a web of transpareht material, successively cutting from said web, at a predetermined rate, patches ofsaid material of i such dimensions as to form covers for the envelop openings and supplying individual envelop blanks having openings therein to said patches successively in a timed relation determined by the position of the openings, said timed relation being such that the distance between the openings always remains the same and the opening in each blank comes into registry with a patch and is cov ered thereby irrespective of the size. of the '15 i GEORGE W. SWIFT, JR.

Witnesses:

LOUISE B: TAYLOR, D. C. WELLS, Jr. .c 

